Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (09): 1046-1049.doi: 10.3866/PKU.WHXB20050920

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The Liquid-Solid Equilibrium and Properties of RbNO3-C2H5OH-H2O Ternary System

ZHANG Jun; WANG Xian-zhao; XIA Shu-ping; GAO Shi-yang   

  1. Henan University of Science and Technology, Luoyang 471003； Xuchang Vocational and Technological College, Xuchang 461000； Xi’an Branch, Institute of Salt Lakes, Chinese Academy of Sciences, Xi’an 710043
  • Received:2005-01-18 Revised:2005-03-24 Published:2005-09-15
  • Contact: ZHANG Jun E-mail:zhjabc@mail.haust.edu.cn

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Abstract: The isothermal solubility, density, and refractive index of the ternary system RbNO3-C2H5OH-H2O at 25 and 50 ℃ have been investigated using phase equilibrium. The compositions of the liquid and solid phases at equilibrium states were determined, and the phase diagrams were obtained. Three empirical formulae were used to correlate the solubility, density, and refractive index. No demixing phenomena were observed in the involved range of temperatures and compositions. The equilibrium solid phases at different temperatures were all simple rubidium nitrate. No new compounds were found.

Key words: Rubidium nitrate, Ethanol, Ternary system, Phase equilibrium, Solubility, Refractive index, Density